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Finding the Fourth Proportional to 99,480.77, 149,021.28 and 49,409.40

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Solution

The fourth proportional to 99,480.77, 149,021.28 and 49,409.40 is: 74,014.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,480.77 : 149,021.28 = 49,409.40 : x
  2. Step 2: Convert to fraction form
    99,480.77/149,021.28 = 49,409.40/x
  3. Step 3: Cross multiply
    99,480.77x = 149,021.28 × 49,409.40
  4. Step 4: Simplify right side
    99,480.77x = 7,363,052,032.03
  5. Step 5: Solve for x
    x = 7,363,052,032.03/99,480.77
  6. Step 6: Final answer
    x = 74,014.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.